Linux system, what if P2P fails to join multicast?

Is there anything you would like to know?

Multicast is not the default settings, and it will cause Join Net to fail. You need to add it manually:
route add -net 224.0.0.0 netmask 224.0.0.0 eth0
Restart Teampel Server service;
After the system starts, add the multicast group router settings and modify/etc/rc.local. Or enable multicast IP option when installing the system.